"""Track mapping."""

from switchboard_consumer.constants import system
from switchboard_consumer.utils.message import get_system_local_id


def create_track_mapping(data):
    """Create a mapping from ISRC to localId."""
    mappings = {}
    try:
        for component in data.get('components', []):
            for side in component.get('sides', []):
                for product_track in side.get('productTracks', []):
                    track = product_track['track']
                    isrc = track['isrc']
                    local_id = get_system_local_id(track, system=system.SONY)
                    mappings[isrc] = local_id
    except (AttributeError, TypeError):
        pass
    return mappings